Totally understandable...this works in lots of businesses... When I sold real estate this applied too. We didn't care about selling the houses that we had open houses for, but we did want to use it to find other potential customers. Lots of people go to open houses just for fun and aren't even in the market, BUT if you get their contact info and send them promotions throughout the year, then when they are in the market they might call you. Selling the house that you have open would just be a bonus.